Note: Please allow slight error due to manual measurement. Thanks for your understanding. specification: Item Type: Fingers Extension Board_x000D_Material: Wood _x000D_Purpose: Prevent and correct finger flexor spasticity or contracture deformity_x000D_Size Chart:_x000D_TypeSizeSuitable People_x000D_S 19 x 19 x 2.5cm / 7.5 x 7.5 x 1in5-12 Years Old _x000D_M20 x 20 x 2.9cm / 7.9 x 7.9 x 1.1in155 ~ 176cm / 61 ~ 69.3in Height_x000D_L22 x 22 x 3.2cm / 8.7 x 8.7 x 1.3in177 ~ 189cm / 69.7 ~ 74.4in Height Features: 1No distinguish for left and right hand, restraint finger bending stress and prevent finger bending. 2Fingerboard made of high quality wood material for durable and reliable use, wonderful accessory. 3Easy to use, simple and convenient to carry out daily rehabilitation training, suitable for hand finger use. 4There are 3 different size finger extension board available, you can choose according to your demands. 5To prevent the fingers cramp bent spasm or atrophy, good effect, not easy to deform and break. PackageList: 1 xFingers Extension Board